High torque motors are virtually just a regular, internally commutated brushless DC Motors mounted with additional gear mechanism on top, to either raise the torque or to decrease the RPM (Revolutions per minute). These DC motors are silent effective and can be used in several hobbyist and industrial application.
Reducing the RPM while maintaining high torque might require adding up more complex gear mechanism hence the cost of these High torque DC motors mostly depends upon the RPM, torque and quality of the motors.The electric motor shaft from the bottom engine though a transmission connects the tiny gear box fixed at its front portion, which generates the required torque while Transmission Chain keeping the RPM low, the entire gears and gear heads are doped with thick viscous grease lubricant.
These High torque Motors come on different RPM’s such as, 5 RPM, 10 RPM, 100 RPM, 300 RPM, 1000 RPM and so forth. The price of these geared motors is based on the RPM, usually lower RPM costs a lot more than 
those of higher RPM.
Applications
High torque and low rpm DC motors are perfect for robotic and hobby applications, thought how big is the electric motor is a matter of concern because it is quiet large in size because of additional gear box but nonetheless it would save the difficulty and cost of adding external gears to the assembly of robots where just the standard DC motors wouldn’t do well. The High Torque, Low RPM DC motors comes with inbuilt gearbox mechanism providing required torque for your robotic app. Hence these motors would be the many favorable choice for the hobbyist robotic projects and tutorials posted right here.
